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Platysma
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Origin: Deep fascia over Pectoralis Major and Deltoid
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Insertion: Body of the Mandible and Angle of the Mouth
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Action: Depression of the Mandible, Tenses the skin of the neck, Draws the corners of the mouth down
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Depressor Labii Inferioris
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Origin: Anterior part of the oblique line of the Mandible
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Insertion: Lower lip at midline
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Action: Everts the lower lip
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Orbicularis Oris
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Origin: Maxilla and Mandible
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Insertion: Skin and mucous membrane of lips
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Action: Closes and protrudes lips
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Corrugator Supercilii
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Origin: Medial end of the superciliary arch
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Insertion: Skin and Fascia deep to the eyebrow
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Action: Draws the eyebrows downward and medially. Wrinkles forehead
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Orbicularis Oculi
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Origin: Medial wall of orbit
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Insertion: Circular path around orbit
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Action: Closes the eyelids and Compresses the lacrimal sac
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Occipitofrontalis
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Origin: Epicranial aponeurosis
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Insertion: Galea aponeurotica
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Action: Raises eyebrows and wrinkles the skin of forehead horizontally
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